<template>
  <body id="poster">
    <div class="login_container">
      <div class="login_box">
        <!-- 头像区域 -->
        <div class="avator_box">
          <img src="../assets/image/logo_01.jpg" alt="">
        </div>
        <!-- 表单区域 -->
        <el-form :model="loginForm" :rules="lgoinFormRules" ref="loginFormRef" label-width="0px" class="login_form">
          <el-form-item prop="username">
            <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid" placeholder="请输入用户名" clearable></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password" placeholder="请输入登录密码" clearable></el-input>
          </el-form-item>
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLgoinForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </body>
</template>

<script>
export default {
  data(){
    return{
      loginForm:{
        username:"admin",
        password:"123456"
      },
      lgoinFormRules:{
        username:[
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 2, max: 11, message: '长度在 2 到 11 个字符', trigger: 'blur' }
        ],
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 20, message: '长度在 6 到 20 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    resetLgoinForm(){
      this.$refs.loginFormRef.resetFields();
    },
    login(){
      this.$refs.loginFormRef.validate(async valid => {
        if(!valid) return;
        const {data: res} = await this.$http.post('login',this.loginForm);
        if(res.meta.status != 200) return this.$message.error("用户名或密码错误");
        this.$message.success("登录成功");
        window.sessionStorage.setItem("token",res.data.token);
        window.sessionStorage.setItem("username",res.data.username);
        this.$router.push("/home");
      });
    }
  }
}
</script>

<style lang="less" scoped>
  #poster {
    background:url("../assets/image/login_bg2.jpg") no-repeat;
    background-position: center;
    height: 100%;
    width: 100%;
    background-size: cover;
    position: fixed;
  }
  .login_container{
    height: 100%;
  }
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position:absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avator_box{
      width: 130px;
      height: 130px;
      border:1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position:absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
      }
    }
  }

  .btns{
    display: flex;
    justify-content: flex-end;
  }

  .login_form{
    position:absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
</style>